network Archives | JUMPSEC LABS

Bullet Proofing Your Email Gateway

by Patryk Zajdel | Jun 19, 2024 | Hardening, Mail Security, network

In this labs post, I will introduce you to modern security controls that are currently used (but not always correctly) by the vast majority of enterprises, and hopefully by the end of this write-up, the topic will become a little clearer and the concepts will become easier to grasp. In today’s world of spammers, intruders, and fake emails, having a robust setup for your email deliveries is crucial. Email security is a constant challenge, with businesses and individuals facing an increasing...

What’s in a Name? Writing custom DNS tunnelling protocol, exploiting unexpected AWS Lambda misconfiguration – in a web app Pen test (Part 2)

by Sunny Chau | Jun 13, 2024 | burpsuite, Exploitation, network, Research, Vulnerability

In Part 1 of the series we looked at how an AWS Lambda-powered feature was exploited in a web app penetration test initially leading to RCE and further on with out-of-band data exfiltration via DNS. Though the exact mechanism of achieving remote-code execution with Python was not discussed, we went in depth in how to return data as a result of the code being executed. Initially, with ascii-to-integer encoding I was able to find the username of the runtime user - sbx_userNNN. In the first blog...

What’s in a Name? Writing custom DNS tunnelling protocol, exploiting unexpected AWS Lambda misconfiguration – in a web app Pen test (Part 1)

by Sunny Chau | Jun 6, 2024 | burpsuite, Exploitation, network, Research, Vulnerability

This is a war story of an AWS web application test where remote code execution was first obtained on the client's application. Then I needed to write my own DNS tunnelling 'protocol' to get the data out. Following a number of twists and turns I impersonated the application and attempted to laterally move within the AWS tenant. Before storytelling though, let's start with a public service announcement: The Public Service Announcement As the title suggests, I discovered that it was possible to...

Burp Suite and Beyond: Exploring non-HTTP protocols using MITM_RELAY

by editor | Aug 24, 2021 | Application Security, burpsuite, network, Network Tools, Research

In this article, Muhammet takes us on a deep technical journey to persevere beyond the limitations of the proxy tool Burpsuite, and explore non-HTTP, application-layer protocols using ‘MITM RELAY’.

JUMPSEC LABS

Bullet Proofing Your Email Gateway

What’s in a Name? Writing custom DNS tunnelling protocol, exploiting unexpected AWS Lambda misconfiguration – in a web app Pen test (Part 2)

What’s in a Name? Writing custom DNS tunnelling protocol, exploiting unexpected AWS Lambda misconfiguration – in a web app Pen test (Part 1)

Burp Suite and Beyond: Exploring non-HTTP protocols using MITM_RELAY

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